Appleton's dictionary of machines, mechanics, engine-work, and engineering . us speeds of which the boring-bar is susceptible. Turns per minute. Turns per minute. 1 •333 X 3 = 1 2 •416 3 ?520 4 •650 y/ -650 X 3 = 1-4 5 •812 ./•812 X 3 = 156 6 1-015 7 1-269 8 1-586 91-982 1-982 X 3=5-94 10 2-478 113-077 12 3-871 4-8396-0497-5619-45111-814114-767H8-457123-079. 28-842! 36-0532345-0662456-333 The speeds increase as 1 to 1J, so that any speed within the range may be procured to within J of 84that required; that is, the boring speed being 7 feet per minute, the greatest deviation will be — = 10£ 8in
Appleton's dictionary of machines, mechanics, engine-work, and engineering . us speeds of which the boring-bar is susceptible. Turns per minute. Turns per minute. 1 •333 X 3 = 1 2 •416 3 ?520 4 •650 y/ -650 X 3 = 1-4 5 •812 ./•812 X 3 = 156 6 1-015 7 1-269 8 1-586 91-982 1-982 X 3=5-94 10 2-478 113-077 12 3-871 4-8396-0497-5619-45111-814114-767H8-457123-079. 28-842! 36-0532345-0662456-333 The speeds increase as 1 to 1J, so that any speed within the range may be procured to within J of 84that required; that is, the boring speed being 7 feet per minute, the greatest deviation will be — = 10£ 8inches per minute. The cone-pulleys of the machine are driven by a similar set of cone-pulleys on an intermediate shaft is again driven from the main shaft by pulleys of the following relative diameters: | 3 * in~ 22 i in. 3 feet. The diameters of these pulleys are to each other as the first to the fifth speed of the bar, so that thesmaller is to the larger pulley as ^-333 : ^-812 = 1 : 1-56. The increase of speed from the largest LATHE. 201. LATHE.
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Keywords: ., bookcentury1800, booksubjectmechanicalengineering, bookyear1861
